Article,
The scissors mode and other magnetic and electric dipole excitations in the transitional nuclei Hf-178,Hf-180
Nuclear Physics A, 618 (1-2): 141-165 (May 1997)
DOI: 10.1016/S0375-9474(97)00054-7
Abstract
Photon scattering experiments have been performed on the heavy deformed
nuclei Hf-178.180 using an E-gamma < 4 MeV bremsstrahlung beam as a
continuous energy photon source, Numerous dipole excitations have been
identified from the spectra of high-resolution Ge gamma detectors,
Spins, K quantum numbers, dipole excitation strengths, and level widths,
have been extracted from the scattering cross sections, From the
measured level widths lifetimes of 67 levels can be deduced. The
excitation strength of the scissors mode is discussed and extends the
systematics from the neighboring rare earth nuclei, Besides the Delta K
= 1 excitations other dipole excitations have been observed that are
distinguished from the scissors mode states by their different decay
behavior. (C) 1997 Elsevier Science B.V.
